The Prince of Wales Hospital for limbless sailors and soldiers opened on 20 February 1918 in James Howell House, formerly a domestic house and lodging house. It later developed into an orthopaedic hospital. To mark the opening in 1918, a cromlech was erected in the front garden by Sir John Lynn-Thomas, a surgeon at the hospital; it is a copy in Radyr stone of the prehistoric cromlech (nprn 227289) at St Lythans near Dyffryn House. A second Prince of Wales Orthopaedic Hospital (nprn 406995) was opened in 1953 in Rhydlafr, Cardiff.
RCAHMW, 16 November 2007.